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A handy off-line thesaurus based on WordNet

Artha is a handy English thesaurus having distinct features like
look up on a global hot key press, passive notifications of a
selected text's definitions, suggestions for misspelled words, etc.
Once launched, it sits on the system tray monitoring for a pre-set
hot key combination. When some text is selected on any window and
the hotkey is pressed, it pops-up with the word looked-up. Should
the user prefer passive notifications over the app. popping-up,
this can be done by enabling the notifications option.

Artha is written from scratch in pure C using GTK+, with WordNet
as it database corpus. It may be used as an advanced replacement
for the proprietary WordWeb in GNU/Linux environments.